The best replacement for stepper motor is servo.

The best alternatives to stepper motor are rated as following:
★★★★★  servo
★★★★★  dc motor
★★★★  servo motor
★★  brushless
★★  gear motor
★★  linear motor
★  continuous servo
★  linear actuator
★  induction motor
★  encoder motor
  micro motor
  servo motors
  bipolar stepper motor
  ac motor
  brushless motor
  dc servo motor

Your alternative for stepper motor is not listed? Suggest!
Speaking about stepper motor, one probably shouldn't forget about arduino.

Other search terms related to stepper motor and their ratings are:
★★★★★ arduino
★★★ lead screw
★★ h bridge
★ parallel port
8051
You have in mind a companion for stepper motor and it is not yet here? Propose!



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stepper motor
servo
dc motor